Philipp Schuster 452424b66e vmm: api: abstract FD handling behind functions ...

## TL;DR

This unifies error handling, implementation, and logging of config
objects that are populated with additional FDs received as part of
the HTTP API request from the management software. This prevents current
and future code in repetition.

In the future, if we want to support let's say virtio-blk with external
FDs, the AddBlk API handler simply needs a call to `attach_fds_to_cfg()`
and gets all the magic for free.

## Motivation

The motivation of the new abstraction is to provide a verbose, solid,
and bulletproof solution for a complex domain. The interaction between

- the management layer,
- the passing of file descriptors over UNIX domain sockets via
  SCM_RIGHTS,
- the attachment of configurations to those FDs,
- and the ability to give new developers clear insights into what
  happens under the hood

is not trivial. These factors justify encapsulating the complexity
behind a convenient and well-documented abstraction, making the system
both robust in production and approachable for new developers.

In addition, it allows us to perform unit testing. Further, We get rid
of existing partial code duplication and inconsistencies.

Finally, while this approach may initially result in more code, every
new handler that accepts FDs benefits from reduced duplication and a
correct implementation by relying on the shared abstraction. This will
also enable future functionality, such as virtio-blk devices backed by
FDs which can then be integrated with ease.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com

2025-09-22 14:29:54 +00:00

..

src

vmm: api: abstract FD handling behind functions

2025-09-22 14:29:54 +00:00

build.rs

build: Add "fuzzing" as a valid cfg(..) attribute

2024-05-08 08:10:28 +00:00

Cargo.toml

build: upgrade whole* workspace to Rust edition 2024

2025-09-10 18:35:38 +00:00